{
  "manageEntity": {
    "action": "Save",
    "entityId": "522597585",
    "entityType": "Track",
    "nonce": "0x34751f44c21a06b62dcb805399fdd7250d0b4589d70e3e6eb9bd01d5bb60ac48",
    "signature": "0x8e727d022dc8626ff9519151d6582f474006037cbff1b689a98e49fb62bb60ce2aab8c6997fde6b3ddb5ad690cbba128107d47b786fad4b9188e9936a628d6ff1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}